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Old 08-04-2009, 12:01 PM   #1
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Thermostat help needed

maybe someone can help me. I have an older Heil split system A/C heat pump.
Tried to install new thermostat from an old manual (mercury) to a digital. I can't get the A/C to come on.
I went to the attic and found these wires connected to the air handler.
Red to R
Blue to C
Yellow to Y
Green to G
Orange to O
White to W1 and W2 (jumped)
I took a picture of the previous thermostat wiring so I would remember how it was hooked up. PROBLEM picture was deleted now I am unsure. All of the above wires were in use at the thermostat the white wire at the thermostat was stripped in two places and connected to two terminals.
there is a optional jumper on the new Honeywell digital thermostat between Y and W1.
I think it is the white wire that is giving me problems.
I have hooked up the following
red to R
Blue to C
Green to G
Yellow to Y
Orange to O
beyond this I am unsure........jumper or no jumper? White Wire where?


rjkleiner is offline   Reply With Quote
Old 08-05-2009, 06:46 AM   #2
Join Date: Sep 2008
Location: Upstate New York
Posts: 368
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What Honeywell model are you trying to wire up, and what was the old mercury tstat?


dac122 is offline   Reply With Quote

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